LLVM/Clang 3.2 Compiler Competing With GCC

With last week's release of LLVM
3.2, here are new benchmarks of LLVM 3.2 with the Clang C/C++ compiler front-end.
The LLVM/Clang 3.2 performance using last week's source code releases were compared
to the earlier LLVM/Clang 3.1 release and then for competition was the GCC 4.7.2
stable release and the latest GCC 4.8.0 development snapshot.

LLVM/Clang 3.1, LLVM/Clang 3.2, GCC 4.7.2, and GCC 4.8.0 20121223 were the
candidates for testing using the official source packages and building them all
under an Ubuntu 13.04 snapshot. All of the compilers were built in their release/optimized
modes (for LLVM/Clang with no assertions and enabling the optimized mode while
GCC had the release checking mode enabled). All of the testing from Ubuntu 13.04
with the Linux 3.7 kernel was done from an Intel Core i7 3770K "Ivy Bridge"
CPU. The CFLAGS/CXXFLAGS were set to "-O3 -march=native" during the
testing process.

Additional LLVM/Clang 3.2 benchmarks are forthcoming to look at different compiler
tuning/switches and their impact on performance as well as analysis in other areas
for this increasingly popular and useful compiler infrastructure. All benchmarking
was handled via the Phoronix Test
Suite.